Android ListView使用ArrayAdapter

用ArrayAdapter可以实现简单的ListView的数据绑定，使用的步骤。

(1)定义一个数组来存放ListView中item的内容。

(2)通过实现ArrayAdapter的构造函数来创建一个ArrayAdapter的对象。

(3)通过ListView的setAdapter()方法绑定ArrayAdapter。

res/layout/activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
</RelativeLayout>

res/layout/list.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView  xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
</TextView >

res/values/color.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<drawable name="black">#000000</drawable>
<drawable name="white">#FFFFFF</drawable>
<drawable name="blue">#0000FF</drawable>
<drawable name="ltgray">#CCCCCC</drawable>
</resources>

src/MainActivity.java

package com.example.listviewdemo1;

import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.app.Activity;
import android.graphics.Color;

public class MainActivity extends Activity {

private String[] array = new String[50];
private LinearLayout layout;
private ListView list;
private TextView tv;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

for(int i=0; i< array.length;i++){
array[i] = "数据项" + i;
}

/*添加LinearLayout*/
layout = new LinearLayout(this);
layout.setOrientation(LinearLayout.VERTICAL);
layout.setBackgroundColor(Color.WHITE);

/*添加TextView*/
tv = new TextView(this);
LinearLayout.LayoutParams param1 = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
);
tv.setTextColor(getResources().getColor(R.drawable.blue));
layout.addView(tv, param1);

/*添加ListView*/
list = new ListView(this);
LinearLayout.LayoutParams param2 = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
);
list.setBackgroundColor(getResources().getColor(R.drawable.ltgray));
layout.addView(list, param2);
setContentView(layout);

/*创建一个ArrayAdapter的对象：
*第1个参数为上下文;
*第2个参数为一个包含TextView的用来填充ListView的每一行的布局资源ID;
*第3个参数为ListView的内容.
*/
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.list, array);
list.setAdapter(adapter);

list.setOnItemSelectedListener(
new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
tv.setText("选择的是：" + arg0.getSelectedItem().toString());
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {

}
});
list.setOnItemClickListener(
new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
tv.setText("点击了：" + array[arg2]);
}
}
);
}
}